Paris Travel Guide - HTML5

of 10 but only in a carnet of 10 for €7.45. (Prices from 16 June 2018) Both tickets are valid for unlimited Metro/RER for 2 hours (without leaving the system) or Bus/Tram transfers for 90 minutes. RER + Métro and Bus + Tram are two separate systems, but they use the same tickets. This means you have to use a new ticket if you transfer from Bus to Metro or vice versa. Once purchased, tickets do not expire. Single tickets can also be purchased onboard buses, costing €2.00 and only valid for one trip without transfers. Remember to consider the price for all members of your group/family, including children, which days you are travelling on, and in which zones you will be travelling.